Star fruit is also known as carambola, it is a fruit native to tropical Southeast Asia. This type of fruit can range from a yellow or greenish color and can be either bitter or sweet.
For people who have kidney diseases, this fruit can be harmful to them due to the substances found in it. Although, it does provide a good amount of vitamin C which in turn would ensure that your body produces the right amount of white blood cells. This would also help your body build up a strong immune system.